5 * Daniel Pirkl <daniel.pirkl@email.cz>
6 * Charles University, Faculty of Mathematics and Physics
9 #include <linux/buffer_head.h>
17 #define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
20 * macros used for retyping
22 #define UCPI_UBH ((struct ufs_buffer_head *)ucpi)
23 #define USPI_UBH ((struct ufs_buffer_head *)uspi)
28 * macros used for accessing structures
31 ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
32 struct ufs_super_block_third *usb3)
34 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
36 return fs32_to_cpu(sb, usb3->fs_u2.fs_sun.fs_state);
38 return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
41 return fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_state);
46 ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
47 struct ufs_super_block_third *usb3, s32 value)
49 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
51 usb3->fs_u2.fs_sun.fs_state = cpu_to_fs32(sb, value);
54 usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
57 usb3->fs_u2.fs_44.fs_state = cpu_to_fs32(sb, value);
63 ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
64 struct ufs_super_block_third *usb3)
66 if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
67 return fs32_to_cpu(sb, usb3->fs_u2.fs_sunx86.fs_npsect);
69 return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
73 ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
77 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
79 ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sun.fs_qbmask[0];
80 ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sun.fs_qbmask[1];
83 ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sunx86.fs_qbmask[0];
84 ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sunx86.fs_qbmask[1];
87 ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_44.fs_qbmask[0];
88 ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_44.fs_qbmask[1];
92 return fs64_to_cpu(sb, tmp);
96 ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
100 switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
102 ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sun.fs_qfmask[0];
103 ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sun.fs_qfmask[1];
106 ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_sunx86.fs_qfmask[0];
107 ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_sunx86.fs_qfmask[1];
110 ((__fs32 *)&tmp)[0] = usb3->fs_u2.fs_44.fs_qfmask[0];
111 ((__fs32 *)&tmp)[1] = usb3->fs_u2.fs_44.fs_qfmask[1];
115 return fs64_to_cpu(sb, tmp);
119 ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
121 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
122 return fs16_to_cpu(sb, de->d_u.d_namlen);
124 return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
128 ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
130 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
131 de->d_u.d_namlen = cpu_to_fs16(sb, value);
133 de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
137 ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
139 if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
143 * TODO turn this into a table lookup
145 switch (mode & S_IFMT) {
147 de->d_u.d_44.d_type = DT_SOCK;
150 de->d_u.d_44.d_type = DT_LNK;
153 de->d_u.d_44.d_type = DT_REG;
156 de->d_u.d_44.d_type = DT_BLK;
159 de->d_u.d_44.d_type = DT_DIR;
162 de->d_u.d_44.d_type = DT_CHR;
165 de->d_u.d_44.d_type = DT_FIFO;
168 de->d_u.d_44.d_type = DT_UNKNOWN;
173 ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
175 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
177 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
179 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
181 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
186 ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
188 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
190 inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
193 inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
196 inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
200 ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
202 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
204 return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
206 return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
208 return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
213 ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
215 switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
217 inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
220 inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
223 inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
228 * These functions manipulate ufs buffers
230 #define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
231 extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
232 extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
233 extern void ubh_brelse (struct ufs_buffer_head *);
234 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
235 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
236 extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
237 extern void ubh_ll_rw_block (int, unsigned, struct ufs_buffer_head **);
238 extern void ubh_wait_on_buffer (struct ufs_buffer_head *);
239 extern unsigned ubh_max_bcount (struct ufs_buffer_head *);
240 extern void ubh_bforget (struct ufs_buffer_head *);
241 extern int ubh_buffer_dirty (struct ufs_buffer_head *);
242 #define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
243 extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
244 #define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
245 extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
250 * macros to get important structures from ufs_buffer_head
252 #define ubh_get_usb_first(ubh) \
253 ((struct ufs_super_block_first *)((ubh)->bh[0]->b_data))
255 #define ubh_get_usb_second(ubh) \
256 ((struct ufs_super_block_second *)(ubh)-> \
257 bh[UFS_SECTOR_SIZE >> uspi->s_fshift]->b_data + (UFS_SECTOR_SIZE & ~uspi->s_fmask))
259 #define ubh_get_usb_third(ubh) \
260 ((struct ufs_super_block_third *)((ubh)-> \
261 bh[UFS_SECTOR_SIZE*2 >> uspi->s_fshift]->b_data + (UFS_SECTOR_SIZE*2 & ~uspi->s_fmask)))
263 #define ubh_get_ucg(ubh) \
264 ((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
268 * Extract byte from ufs_buffer_head
269 * Extract the bits for a block from a map inside ufs_buffer_head
271 #define ubh_get_addr8(ubh,begin) \
272 ((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
273 ((begin) & ~uspi->s_fmask))
275 #define ubh_get_addr16(ubh,begin) \
276 (((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
277 ((begin) & (uspi->fsize>>1) - 1)))
279 #define ubh_get_addr32(ubh,begin) \
280 (((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
281 ((begin) & ((uspi->s_fsize>>2) - 1)))
283 #define ubh_get_addr ubh_get_addr8
285 #define ubh_blkmap(ubh,begin,bit) \
286 ((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
290 * Macros for access to superblock array structures
292 #define ubh_postbl(ubh,cylno,i) \
293 ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \
294 ? (*(__s16*)(ubh_get_addr(ubh, \
295 (unsigned)(&((struct ufs_super_block *)0)->fs_opostbl) \
296 + (((cylno) * 16 + (i)) << 1) ) )) \
297 : (*(__s16*)(ubh_get_addr(ubh, \
298 uspi->s_postbloff + (((cylno) * uspi->s_nrpos + (i)) << 1) ))))
300 #define ubh_rotbl(ubh,i) \
301 ((uspi->s_postblformat != UFS_DYNAMICPOSTBLFMT) \
302 ? (*(__u8*)(ubh_get_addr(ubh, \
303 (unsigned)(&((struct ufs_super_block *)0)->fs_space) + (i)))) \
304 : (*(__u8*)(ubh_get_addr(ubh, uspi->s_rotbloff + (i)))))
307 * Determine the number of available frags given a
308 * percentage to hold in reserve.
310 #define ufs_freespace(usb, percentreserved) \
311 (ufs_blkstofrags(fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nbfree)) + \
312 fs32_to_cpu(sb, (usb)->fs_cstotal.cs_nffree) - (uspi->s_dsize * (percentreserved) / 100))
315 * Macros to access cylinder group array structures
317 #define ubh_cg_blktot(ucpi,cylno) \
318 (*((__fs32*)ubh_get_addr(UCPI_UBH, (ucpi)->c_btotoff + ((cylno) << 2))))
320 #define ubh_cg_blks(ucpi,cylno,rpos) \
321 (*((__fs16*)ubh_get_addr(UCPI_UBH, \
322 (ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
326 * These functions work like classical bitmap operations.
327 * The difference is that we don't have the whole bitmap
328 * in one contiguous chunk of memory, but in several buffers.
329 * The parameters of each function are super_block, ufs_buffer_head and
330 * position of the beginning of the bitmap.
332 #define ubh_setbit(ubh,begin,bit) \
333 (*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))
335 #define ubh_clrbit(ubh,begin,bit) \
336 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
338 #define ubh_isset(ubh,begin,bit) \
339 (*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
341 #define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
343 #define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
345 #define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
346 static inline unsigned _ubh_find_next_zero_bit_(
347 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
348 unsigned begin, unsigned size, unsigned offset)
350 unsigned base, count, pos;
355 base = offset >> uspi->s_bpfshift;
356 offset &= uspi->s_bpfmask;
358 count = min_t(unsigned int, size + offset, uspi->s_bpf);
359 size -= count - offset;
360 pos = ext2_find_next_zero_bit (ubh->bh[base]->b_data, count, offset);
361 if (pos < count || !size)
366 return (base << uspi->s_bpfshift) + pos - begin;
369 static inline unsigned find_last_zero_bit (unsigned char * bitmap,
370 unsigned size, unsigned offset)
373 unsigned char * mapp;
376 mapp = bitmap + (size >> 3);
378 bit = 1 << (size & 7);
379 for (i = size; i > offset; i--) {
380 if ((map & bit) == 0)
392 #define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
393 static inline unsigned _ubh_find_last_zero_bit_(
394 struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
395 unsigned begin, unsigned start, unsigned end)
397 unsigned base, count, pos, size;
402 base = start >> uspi->s_bpfshift;
403 start &= uspi->s_bpfmask;
405 count = min_t(unsigned int,
406 size + (uspi->s_bpf - start), uspi->s_bpf)
407 - (uspi->s_bpf - start);
409 pos = find_last_zero_bit (ubh->bh[base]->b_data,
410 start, start - count);
411 if (pos > start - count || !size)
416 return (base << uspi->s_bpfshift) + pos - begin;
419 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
421 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
422 static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
423 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
425 switch (uspi->s_fpb) {
427 return (*ubh_get_addr (ubh, begin + block) == 0xff);
429 return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
431 return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
433 return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
438 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
439 static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
440 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
442 switch (uspi->s_fpb) {
444 *ubh_get_addr (ubh, begin + block) = 0x00;
447 *ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
450 *ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
453 *ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
458 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
459 static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
460 struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
462 switch (uspi->s_fpb) {
464 *ubh_get_addr(ubh, begin + block) = 0xff;
467 *ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
470 *ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
473 *ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
478 static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
479 __fs32 * fraglist, int cnt)
481 struct ufs_sb_private_info * uspi;
482 unsigned fragsize, pos;
484 uspi = UFS_SB(sb)->s_uspi;
487 for (pos = 0; pos < uspi->s_fpb; pos++) {
488 if (blockmap & (1 << pos)) {
491 else if (fragsize > 0) {
492 fs32_add(sb, &fraglist[fragsize], cnt);
496 if (fragsize > 0 && fragsize < uspi->s_fpb)
497 fs32_add(sb, &fraglist[fragsize], cnt);
500 #define ubh_scanc(ubh,begin,size,table,mask) _ubh_scanc_(uspi,ubh,begin,size,table,mask)
501 static inline unsigned _ubh_scanc_(struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
502 unsigned begin, unsigned size, unsigned char * table, unsigned char mask)
504 unsigned rest, offset;
508 offset = begin & ~uspi->s_fmask;
509 begin >>= uspi->s_fshift;
511 if ((offset + size) < uspi->s_fsize)
514 rest = uspi->s_fsize - offset;
516 cp = ubh->bh[begin]->b_data + offset;
517 while ((table[*cp++] & mask) == 0 && --rest);
523 return (size + rest);